Some new chapters were added to the documentation. This caused
Sphinx to complain, as the literal blocks there are not properly
tagged as such. Also, a new note added there doesn't follow
the ReST format.

This fixes the following warnings:

    Documentation/trace/events.rst:589: WARNING: Definition list ends without a blank line; unexpected unindent.
    Documentation/trace/events.rst:620: WARNING: Inline emphasis start-string without end-string.
    Documentation/trace/events.rst:623: WARNING: Inline emphasis start-string without end-string.
    Documentation/trace/events.rst:626: WARNING: Inline emphasis start-string without end-string.
    Documentation/trace/events.rst:703: WARNING: Inline emphasis start-string without end-string.
    Documentation/trace/events.rst:697: WARNING: Inline emphasis start-string without end-string.
    Documentation/trace/events.rst:722: WARNING: Inline emphasis start-string without end-string.
    Documentation/trace/events.rst:775: WARNING: Definition list ends without a blank line; unexpected unindent.
    Documentation/trace/events.rst:814: WARNING: Inline emphasis start-string without end-string.
    Documentation/trace/events.rst:817: WARNING: Inline emphasis start-string without end-string.
    Documentation/trace/events.rst:820: WARNING: Inline emphasis start-string without end-string.
    Documentation/trace/events.rst:823: WARNING: Inline emphasis start-string without end-string.
    Documentation/trace/events.rst:826: WARNING: Inline emphasis start-string without end-string.
    Documentation/trace/events.rst:829: WARNING: Inline emphasis start-string without end-string.
    Documentation/trace/events.rst:832: WARNING: Inline emphasis start-string without end-string.
    Documentation/trace/events.rst:844: WARNING: Unexpected indentation.
    Documentation/trace/events.rst:845: WARNING: Block quote ends without a blank line; unexpected unindent.
    Documentation/trace/events.rst:849: WARNING: Unexpected indentation.
    Documentation/trace/events.rst:850: WARNING: Block quote ends without a blank line; unexpected unindent.
    Documentation/trace/events.rst:883: WARNING: Inline emphasis start-string without end-string.
    Documentation/trace/events.rst:886: WARNING: Inline emphasis start-string without end-string.
    Documentation/trace/events.rst:889: WARNING: Inline emphasis start-string without end-string.
    Documentation/trace/events.rst:895: WARNING: Bullet list ends without a blank line; unexpected unindent.
    Documentation/trace/events.rst:895: WARNING: Inline emphasis start-string without end-string.
    Documentation/trace/events.rst:968: WARNING: Inline emphasis start-string without end-string.

Fixes: 34ed6357 ("tracing: Documentation for in-kernel synthetic event API")
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Reviewed-by: Tom Zanussi <zanussi@kernel.org>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Link: https://lore.kernel.org/r/afbe367ccb7b9abcb9fab7bc5cb5e0686c105a53.1583250595.git.mchehab+huawei@kernel.orgSigned-off-by: Jonathan Corbet <corbet@lwn.net>